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    Subject[PATCH v6 05/22] gpio: Probe GPIO drivers on demand
    Date
    When looking up a gpiochip through its firmware node, probe it if it
    hasn't already.

    The goal is to reduce deferred probes to a minimum, as it makes it very
    cumbersome to find out why a device failed to probe, and can introduce
    very big delays in when a critical device is probed.

    Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
    ---


    drivers/gpio/gpiolib-of.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
    index fa6e3c8823d6..9a439dab7a87 100644
    --- a/drivers/gpio/gpiolib-of.c
    +++ b/drivers/gpio/gpiolib-of.c
    @@ -19,6 +19,7 @@
    #include <linux/gpio/consumer.h>
    #include <linux/of.h>
    #include <linux/of_address.h>
    +#include <linux/of_device.h>
    #include <linux/of_gpio.h>
    #include <linux/pinctrl/pinctrl.h>
    #include <linux/slab.h>
    @@ -95,6 +96,8 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
    return ERR_PTR(ret);
    }

    + of_device_probe(gg_data.gpiospec.np);
    +
    gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);

    of_node_put(gg_data.gpiospec.np);
    --
    2.4.3


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